{"id":5674,"date":"2016-08-03T09:30:52","date_gmt":"2016-08-03T14:30:52","guid":{"rendered":"https:\/\/www.servimatango.com\/blog\/?p=5674"},"modified":"2019-06-11T09:38:09","modified_gmt":"2019-06-11T14:38:09","slug":"codecs-mas-usados-en-voz-sobre-ip","status":"publish","type":"post","link":"https:\/\/servervoip.com\/blog\/codecs-mas-usados-en-voz-sobre-ip\/","title":{"rendered":"Codecs m\u00e1s usados en voz sobre ip"},"content":{"rendered":"<p><strong>C\u00f3decs<\/strong><\/p>\n<p>La voz debe codificarse para poder ser transmitida por la red IP. Para ello se hace uso de C\u00f3decs que garanticen la codificaci\u00f3n y compresi\u00f3n del audio o del video para su posterior decodificaci\u00f3n y descompresi\u00f3n antes de poder generar un sonido o imagen utilizable. Seg\u00fan el C\u00f3dec utilizado en la transmisi\u00f3n, se utilizar\u00e1 m\u00e1s o menos ancho de banda. La cantidad de ancho de banda suele ser directamente proporcional a la calidad de los datos transmitidos.<\/p>\n<p>* GSM<br \/>\nEs un est\u00e1ndar de telefon\u00eda celular. Este sistema incluye un c\u00f3dec llamado RPE-LPT (Regular Pulse Excitation Long Term Prediction), al cual frecuentemente se refiere simplemente como GSM cuando de c\u00f3decs se habla<\/p>\n<p>En este c\u00f3dec, la se\u00f1al de voz es dividida en bloques de 20ms. Cada uno de los bloques previos se usa para predecir el comportamiento de la muestra siguiente. Luego estos bloques son pasados al c\u00f3dec, que los comprime a 13Kbit\/s con una frecuencia de muestreo de 8Khz, por lo que se obtiene muestras de 260 bits.<\/p>\n<p>Los nuevos sistemas GSM incorporan dos nuevos c\u00f3decs, pero estos est\u00e1n fuertemente cubiertos bajo sus patentes:<br \/>\n&#8211; EFR (Enhanced Full Rate) basado en ACELP (Algebraic Code Excited Linear Prediction)<br \/>\n&#8211; HR (Half Rate) basado en CELP-VSELP (Code Excited Linear Prediction \u2013 Vector Sum Excited Linear Prediction)<\/p>\n<p>\n<div id=\"rev_slider_3_1_wrapper\" class=\"rev_slider_wrapper fullwidthbanner-container\" style=\"float:left;background-color:#E9E9E9;padding:0px;margin-left:0px;margin-right:0px;margin-top:0px;margin-bottom:0px;\">\n<!-- START REVOLUTION SLIDER 5.0.9 auto mode -->\n\t<div id=\"rev_slider_3_1\" class=\"rev_slider fullwidthabanner\" style=\"display:none;\" data-version=\"5.0.9\">\n<ul>\t<!-- SLIDE  -->\n\t<li data-index=\"rs-28\" data-transition=\"random\" data-slotamount=\"7\"  data-easein=\"default\" data-easeout=\"default\" data-masterspeed=\"300\"  data-thumb=\"\"  data-rotate=\"0\"  data-saveperformance=\"off\"  class=\"voipswitch videos subtitulos\" id=\"voipswitch videos subtitulos\" voipswitch videos subtitulos data-title=\"SubtitulosTexto\" data-description=\"\">\n\t\t<!-- MAIN IMAGE -->\n\t\t<img src=\"https:\/\/servervoip.com\/blog\/wp-content\/plugins\/revslider\/admin\/assets\/images\/dummy.png\"  alt=\"\"  width=\"879\" height=\"51\" data-lazyload=\"https:\/\/servervoip.com\/blog\/wp-content\/plugins\/revslider\/admin\/assets\/images\/transparent.png\" data-bgposition=\"center top\" data-bgfit=\"cover\" data-bgrepeat=\"no-repeat\" class=\"rev-slidebg\" data-no-retina>\n\t\t<!-- LAYERS -->\n\n\t\t<!-- LAYER NR. 1 -->\n\t\t<div class=\"tp-caption   tp-resizeme\" \n\t\t\t id=\"slide-28-layer-2\" \n\t\t\t data-x=\"\" \n\t\t\t data-y=\"1\" \n\t\t\t\t\t\tdata-width=\"['none','none','none','none']\"\n\t\t\tdata-height=\"['none','none','none','none']\"\n\t\t\tdata-transform_idle=\"o:1;\"\n \n\t\t\t data-transform_in=\"opacity:0;s:300;e:Power2.easeInOut;\" \n\t\t\t data-transform_out=\"opacity:0;s:300;s:300;\" \n\t\t\tdata-start=\"500\" \n\t\t\tdata-responsive_offset=\"on\" \n\n\t\t\t\n\t\t\tstyle=\"z-index: 5;\">\n\t\t\t\t<div class=\"rs-looped disabled\" ><img src=\"https:\/\/servervoip.com\/blog\/wp-content\/plugins\/revslider\/admin\/assets\/images\/dummy.png\" alt=\"\" data-ww=\"879\" data-hh=\"51\" data-lazyload=\"https:\/\/www.servervoip.com\/blog\/wp-content\/uploads\/2015\/10\/fondo-en-degradado-con-signod-copia.jpg\" data-no-retina> \n\t\t\t\t<\/div>\n\t\t<\/div>\n\n\t\t<!-- LAYER NR. 2 -->\n\t\t<div class=\"tp-caption mediumbgorange   tp-resizeme\" \n\t\t\t id=\"slide-28-layer-1\" \n\t\t\t data-x=\"6\" \n\t\t\t data-y=\"5\" \n\t\t\t\t\t\tdata-width=\"['653']\"\n\t\t\tdata-height=\"['41']\"\n\t\t\tdata-transform_idle=\"o:1;\"\n \n\t\t\t data-transform_in=\"opacity:0;s:300;e:Power3.easeInOut;\" \n\t\t\t data-transform_out=\"auto:auto;s:300;\" \n\t\t\tdata-start=\"500\" \n\t\t\tdata-splitin=\"none\" \n\t\t\tdata-splitout=\"none\" \n\t\t\tdata-responsive_offset=\"on\" \n\n\t\t\t\n\t\t\tstyle=\"z-index: 6; 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style=\"display:none;\" data-version=\"5.0.9\">\n<ul>\t<!-- SLIDE  -->\n\t<li data-index=\"rs-15\" data-transition=\"random\" data-slotamount=\"7\"  data-easein=\"default\" data-easeout=\"default\" data-masterspeed=\"300\"  data-link=\"http:\/\/www.servervoip.com\/voipswitch-comprar.php?server=50_promo\"  data-target=\"_blank\"  data-slideindex=\"back\" data-thumb=\"https:\/\/servervoip.com\/blog\/wp-content\/uploads\/2015\/10\/fondo-slider-con-letras31-100x50.jpg\"  data-rotate=\"0\"  data-saveperformance=\"off\"  data-title=\"Slide\" data-description=\"\">\n\t\t<!-- MAIN IMAGE -->\n\t\t<img src=\"https:\/\/servervoip.com\/blog\/wp-content\/plugins\/revslider\/admin\/assets\/images\/dummy.png\"  alt=\"\"  width=\"879\" height=\"262\" data-lazyload=\"https:\/\/servervoip.com\/blog\/wp-content\/uploads\/2015\/10\/fondo-slider-con-letras31.jpg\" data-bgposition=\"center top\" data-bgfit=\"cover\" data-bgrepeat=\"no-repeat\" class=\"rev-slidebg\" data-no-retina>\n\t\t<!-- LAYERS 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height=\"262\" data-lazyload=\"https:\/\/servervoip.com\/blog\/wp-content\/uploads\/2015\/10\/fondo-slider-con-letras52.jpg\" data-bgposition=\"center top\" data-bgfit=\"cover\" data-bgrepeat=\"no-repeat\" class=\"rev-slidebg\" data-no-retina>\n\t\t<!-- LAYERS -->\n\t<\/li>\n\t<!-- SLIDE  -->\n\t<li data-index=\"rs-18\" data-transition=\"random\" data-slotamount=\"7\"  data-easein=\"default\" data-easeout=\"default\" data-masterspeed=\"300\"  data-link=\"http:\/\/www.serverpbx.com\/central-telefonica-pagos.php\"   data-slideindex=\"back\" data-thumb=\"https:\/\/servervoip.com\/blog\/wp-content\/uploads\/2015\/10\/fondo-slider-con-letras61-100x50.jpg\"  data-rotate=\"0\"  data-saveperformance=\"off\"  data-title=\"Slide\" data-description=\"\">\n\t\t<!-- MAIN IMAGE -->\n\t\t<img src=\"https:\/\/servervoip.com\/blog\/wp-content\/plugins\/revslider\/admin\/assets\/images\/dummy.png\"  alt=\"\"  width=\"879\" height=\"262\" 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Codificaci\u00f3n lineal, utiliza modulaci\u00f3n PCM (Pulse Code Modulation) y codificadores A-law y mu-law. El bloque de codificaci\u00f3n de G.711 es un logaritmo escalar cuantizado dise\u00f1ado para discursos de banda-angosta. El discurso de banda-angosta es definido como una se\u00f1al de voz con un ancho de banda an\u00e1loga de 4 Kh y frecuencia de muestreo de Nyquist.<\/p>\n<p>El ancho de banda que ocupa la codificaci\u00f3n usando G711 es 64 Kbits\/s con una frecuencia de muestreo de 8 Khz. Tiene dos est\u00e1ndares de codificaci\u00f3n, a-law para Europa y u-law Jap\u00f3n.<\/p>\n<p>* G729<br \/>\nEs uno de los c\u00f3decs de voz sobre IP mas eficientes que existe, lamentablemente para usar este c\u00f3dec es necesario pagar una licencia de uso. Su uso es muy sencillo y el ancho de banda que ocupa la codificaci\u00f3n G.729 es 8Kbits\/s con una frecuencia de muestreo de 8Khz. El tama\u00f1o de la trama es de 10ms.<\/p>\n<p>* G723<br \/>\nEl uso de este c\u00f3dec requiere una licencia proporcionada por Sipro Lab Telecom, sus propietarios. Es usado muy frecuentemente por el protocolo H.323 y tiene un consumo de ancho de banda muy bajo debido a su alto nivel de compresi\u00f3n (entre 6.3Kbps y 5.3Kbps).<\/p>\n<p>Tomado de:<br \/>\nFernando, A. (2006). Dise\u00f1o de una red telef\u00f3nica IP interna entre los colegios San Jos\u00e9 \u2013 La Salle de Guayaquil y Hno Miguel \u2013 La Salle de Quito e implementaci\u00f3n de un prototipo, usando como central telef\u00f3nica servidores con Sistema Operativo libre y Software libre (tesis de pregrado). Escuela Superior Polit\u00e9cnica del Litoral, Guayaquil, Ecuador.<\/p>\n<p>Fuente:<br \/>\nhttps:\/\/www.google.com.ec\/url?sa=t&#038;rct=j&#038;q=&#038;esrc=s&#038;source=web&#038;cd=3&#038;cad=rja&#038;uact=8&#038;ved=0ahUKEwiQg7u7rqXOAhVERSYKHZ7oDyQQFggmMAI&#038;url=https%3A%2F%2Fwww.dspace.espol.edu.ec%2Fbitstream%2F123456789%2F21561%2F1%2FTesis%2520LicRed%2520VoIP.docx&#038;usg=AFQjCNEhWkJaZPdacaMi8ZlD2WXS_6jIrA&#038;bvm=bv.128617741,d.eWE<\/p>\n<h2>Contactos<\/h2>\n<p>Obt\u00e9n respuestas sobre tu Empresa Voip. Habla con un asesor especializado para despejar tus inquietudes.<\/p>\n<p><a href=\"http:\/\/www.servervoip.com\/voipswitch\/contacto-server-voip-switch\/\"><img loading=\"lazy\" src=\"https:\/\/www.servimatango.com\/blog\/wp-content\/uploads\/2015\/09\/contacto-servervoip.jpg\" alt=\"contacto servervoip\" width=\"690\" height=\"207\" class=\"aligncenter size-full wp-image-4446\" srcset=\"https:\/\/servervoip.com\/blog\/wp-content\/uploads\/2015\/09\/contacto-servervoip.jpg 690w, https:\/\/servervoip.com\/blog\/wp-content\/uploads\/2015\/09\/contacto-servervoip-300x90.jpg 300w\" sizes=\"(max-width: 690px) 100vw, 690px\" \/><\/a><br \/>\n[st_button button_text=\u00bb SOLICITA TU SERVER AHORA \u25ba\u00bb button_type_url=\u00bbhttp:\/\/www.servervoip.com\/voipswitch-comprar.php?server=50_promo\u00bb open_in=\u00bbnew_window\u00bb icon=\u00bbfa fa-shopping-cart\u00bb button_alignment=\u00bbcenter\u00bb button_margin_top=\u00bb-50&#8243; button_margin_bottom=\u00bb-20&#8243; button_size=\u00bbbtn-lg\u00bb button_color=\u00bbbtn-blue\u00bb appearing_animation=\u00bbfade_in\u00bb wrapper_padding_top=\u00bb0&#8243; wrapper_padding_left=\u00bb0&#8243; wrapper_padding_bottom=\u00bb0&#8243; wrapper_padding_right=\u00bb0&#8243; wrapper_bg_opacity_slider=\u00bb\u00bb id_wrapper=\u00bbelm_5c828b7094d30&#8243; ][\/st_button]<br \/>\n&nbsp;<br \/>\n<strong>ServerVoIP<\/strong> te proporciona todas las herramientas necesarias para que crees y desarrolles <strong>tu negocio de comunicaci\u00f3n por internet.<\/strong><\/p>\n<p>Pertenece al Selecto Grupo de Emprendedores que decidieron cambiar su vida invirtiendo en un <strong>Server con ServerVoIP.<\/strong><\/p>\n<p><strong>ServerVoip <\/strong>presenta el mejor server fisico dedicado para telefonia voip que incluye el software de telefon\u00eda ip \u00abVoipSwitch\u00bb especial para voz sobre ip.<\/p>\n<p><strong>VoipSwitch <\/strong>es la plataforma ideal para que sin necesidad de conocimientos t\u00e9cnicos crees tu propia empresa de Telefon\u00eda IP VoIP y encuentres una forma de ganar DINERO en la red siendo carrier de telefon\u00eda sobre Ip (Voip). <\/p>\n<p>Te brindamos todas las herramientas para que est\u00e9s al nivel de las grandes empresas y negocios; puedas obsequiar llamadas gratis como estrategia de marketing en fidelizaci\u00f3n a tus clientes \/ free entre tus clientes; el servidor VoIP te permite utilizar m\u00faltiples proveedores como nosotros tenemos <a href=\"http:\/\/www.alosip.com\/\" target=\"_blank\" rel=\"noopener noreferrer\">www.alosip.com.<\/a> (carrier \/ routes) para un mismo destino, vender terminaci\u00f3n (wholesale), clientes finales (retail), etc.<\/p>\n<p>El software te proporciona todo lo que necesitas; sistema llave en mano: para crear tu empresa de telefon\u00eda IP (VoIP) bajo tu propio nombre o marca. M\u00e1s informaci\u00f3n en <a href=\"http:\/\/marcaBlanca.servervoip.com\" target=\"_blank\" rel=\"noopener noreferrer\">marcaBlanca.servervoip.com<\/a><\/p>\n<p>Para que CREES y DESARROLLES tu propia empresa de telefonia por internet, revisa m\u00e1s detalles en <a href=\"http:\/\/www.servervoip.com\/voipswitch\/\">VoIPSwitch<\/a><\/p>\n<hr \/>\n<h1 style=\"text-align: center;\">\u00bfQuieres Emprender por Internet?<\/h1>\n<h3 style=\"text-align: center;\">\u00abAhora Trabajar desde la Comodidad de tu Casa y Ganar Dinero por Internet&#8230; Nunca Hab\u00eda Sido tan F\u00e1cil, R\u00e1pido y con RESULTADOS Impresionantes\u00bb<\/h3>\n<p style=\"text-align: center;\">Descubre el NEGOCIO Perfecto y convi\u00e9rtete en un EMPRESARIO de \u00c9xito creando y desarrollando tu Propia Empresa de Telefon\u00eda por Internet. <strong>Suscr\u00edbete y RECIBE FREE<\/strong>:<\/p>\n<h2 style=\"text-align: center;\">\u00a1Sie7e Poderosas Razones Que Tiene el EMPRENDEDOR Exitoso para Crear su Propia Empresa de Telefon\u00eda por Internet VoIP!&#8230;<\/h2>\n<p><img loading=\"lazy\" class=\"aligncenter wp-image-1229 size-medium\" src=\"http:\/\/servimatango.com\/negocios-rentables\/wp-content\/uploads\/2015\/07\/libro-server-voip-241x300.png\" alt=\"libro server voip\" width=\"241\" height=\"300\" \/><br \/>\n[st_accordion div_margin_bottom=\u00bb15&#8243; initial_open=\u00bb0&#8243; multi_open=\u00bbyes\u00bb wrapper_padding_top=\u00bb0&#8243; wrapper_padding_left=\u00bb0&#8243; wrapper_padding_bottom=\u00bb0&#8243; wrapper_padding_right=\u00bb0&#8243; wrapper_bg_opacity_slider=\u00bb\u00bb wrapper_bg_opacity=\u00bb50&#8243; wrapper_border_style=\u00bboutset\u00bb wrapper_rounded_topleft=\u00bb3&#8243; id_wrapper=\u00bbelm_5c828b0bd3fa6&#8243; ][st_item_accordion heading=\u00bb<img class=aligncenter src=http:\/\/servimatango.com\/negocios-rentables\/wp-content\/uploads\/2015\/07\/Boton-descarga-reporte.gif alt=Reporte width=500 height=145 \/>\u00bb id_wrapper=\u00bbelm_5c828b0bd3f58&#8243; ]<center><script type=\"text\/javascript\" src=\"http:\/\/app.getresponse.com\/view_webform.js?wid=10619501&#038;u=kSvx\"><\/script><\/center>[\/st_item_accordion][\/st_accordion]<\/p>\n<p><a href=\"https:\/\/www.servimatango.com\/blog\/sip-telefonia\/\">SIP Telefon\u00eda e IVR (Respuesta Autom\u00e1tica)<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>C\u00f3decs La voz debe codificarse para poder ser transmitida por la red IP. Para ello se hace uso de C\u00f3decs que garanticen la codificaci\u00f3n y compresi\u00f3n del audio o del video para su posterior decodificaci\u00f3n y descompresi\u00f3n antes de poder generar un sonido o imagen utilizable. Seg\u00fan el C\u00f3dec utilizado en la transmisi\u00f3n, se utilizar\u00e1&#8230;<\/p>\n<p><a class=\"excerpt-read-more btn btn-primary\" href=\"https:\/\/servervoip.com\/blog\/codecs-mas-usados-en-voz-sobre-ip\/\" title=\"ReadCodecs m\u00e1s usados en voz sobre ip\">Read More<\/a><\/p>\n","protected":false},"author":1,"featured_media":5677,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"video","meta":[],"categories":[13],"tags":[],"_links":{"self":[{"href":"https:\/\/servervoip.com\/blog\/wp-json\/wp\/v2\/posts\/5674"}],"collection":[{"href":"https:\/\/servervoip.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/servervoip.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/servervoip.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/servervoip.com\/blog\/wp-json\/wp\/v2\/comments?post=5674"}],"version-history":[{"count":0,"href":"https:\/\/servervoip.com\/blog\/wp-json\/wp\/v2\/posts\/5674\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/servervoip.com\/blog\/wp-json\/wp\/v2\/media\/5677"}],"wp:attachment":[{"href":"https:\/\/servervoip.com\/blog\/wp-json\/wp\/v2\/media?parent=5674"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/servervoip.com\/blog\/wp-json\/wp\/v2\/categories?post=5674"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/servervoip.com\/blog\/wp-json\/wp\/v2\/tags?post=5674"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}